W83194BR-903_06 Datasheet, PDF (8/26 Pages) Winbond – STEPLESS VIA PT/PM MAIN CLOCK GENERATOR

W83194BR-903/W83194BG-903
CPU, AGP, and PCI Clock Outputs, continued.
PIN
PIN NAME
TYPE
DESCRIPTION
9
PCI_F2
OUT 3.3V PCI free running clock output.
19 PCI5
PCI_STOP#*
20 PCI6
CPU_STOP#*
13,14,15,16 PCI [1:4]
OUT 3.3V PCI clock output. Select by pin 12 MODE^& power up
initial =0.
IN_tp120k Active low, Stop all PCI clock output besides the free running
clocks. Select by pin 12 MODE^& power up initial =1.
OUT 3.3V PCI clock output. Select by pin 12 MODE^& power up
initial =0.
IN_tp120k Active low, Stop all CPU clock outputs. Select by pin 12
MODE^& power up initial =1.
OUT Low skew (< 250ps) PCI clock outputs.
5.3 Fixed Frequency Outputs
PIN
PIN NAME
1
REF0
FS1*
2
REF1
FS0^&
21 48MHz
FS3^&
22 24_48MHz
SEL24_48#^&
36,35 25MHz_[0:1]
TYPE
OUT
IN_tp120k
OUT
IN_td120k
OUT
IN_td120k
OUT
IN_td120k
OUT
DESCRIPTION
14.318MHz output.
Latched input for FS1 at initial power up for H/W selecting
the output frequency. This is internal 120K pull up.
14.318MHz output.
Latched input for FS0 at initial power up for H/W selecting
the output frequency. This is internal 120K pull down.
48MHz clock output for USB.
Latched input for FS3 at initial power up for H/W selecting
the output frequency. This is internal 120K pull down.
24MHz or 48MHz(default) clock output, In power on reset
period, it is a hardware-latched pin, and it can be R/W by
I2C control after power on reset period. Select by register 5
bit 7.
Latched input for 24MHz or 48MHz select pin. This is
internal 120K pull down default 48MHz. In power on reset
period, it is a hardware-latched pin, and it can be R/W by
I2C control after power on reset period. Select by register 5
bit 7.
25MHz 2.5V push pull clock output.
5.4 I²C Control Interface
PIN
PIN NAME
32 SDATA*
31 SCLK*
TYPE
DESCRIPTION
I/OD Serial data of I²C 2-wire control interface with internal 120K
pull-up resistor.
IN_tp120k ^{Serial clock of I2C 2-wire control interface with internal 120K}
pull-up resistor.
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